Improvement in vises



J. EJBRUNDAGE.

vIsE.

Eatented May 9,l 1816.

UNITED STATES PATENT QEEICE.

JAMES E. BRUNDAGE, OF WILLIAMSBURG, BROOKLYN, ASSIGNOR OF ONE- HALF HISRIGHT TO EUGENE F. BRUNDAGE, OF HARLEM, NEW YORK.

IMPROVEMENT IN VISES'.

Specification forming part of Letters Patent No. 177,090, dated May 9,1876:; application filed September 15, 1875.

Toall whom t may concern i Be it known that I, JAMES E. BRUNDAGE, ofWilliamsburg, in the city of Brooklyn, county of Kings and State of NewYork, have invented an Improved Vise; and I do hereby declare that thefollowing is a full, clear, and exact -description ofthe same, referencebeing had to the accompanying drawing, making part of this specitcationlMy invention relates to a novel mode of providing for the admission ofdiilerent'thicknesses of Work between the jaws of a vise byrapidlyopening and closing the jaws-independently ofthe screw.

The invention consists in the combination of a divided nut, and a deviceot' novel construction for operating the same, whereby the nut and screwmay be readily disengaged to allowthe movable jaw to be rapidly movedtoward or away from the xed. jaw, and again thrown into engagement toprovidev for the nice adjustment ot' the jaws. 1

In the accompanying drawing, Figure lis a side view of avise-constructed according to my invention. Fig. 2 is a longitudinalvertical section. Fig. 3 is an end view, partly in section. Fig. 4 is adetail sectional view.

A represents the xed jaw, and B themov able jaw, the bar b of which ishollow and slides in the fixed jaw A, in the usual manner. In the fixedjaw is an upright frame, D, which carries a nut composed of two halves,The upper half, C2, is fixed, and may consist simply of a thread cut inthe upper part of the frame D. lrIhe lower half, C1, is

' arranged to slide vertically in the lower art of the frame. lUnder thelower haltl is a We geshaped piece, F, sliding nearly horizontally inthe frame D in a groove, d, the bottom of which is an incline plane. Therear or larger end of the wedge F is connected by an arm, l, with arock-shaft, I, provided with a lever or handle, h, at one end, outsideofthejaw A. When the lever h is elevated the wedge F is drawn outward,so as'to allow the lower halt' of the nut to fall out of contact withthe screw G, whereupon the movable jaw B maybe rapidly moved by hand,soas to slide inward or outward, either toward or from the fixed jaw,the bar b sliding in its seat in the fixed jaw. When the leverh isdepressed the wedge Fis driven inward and upward on the inclined plane,so as to raise the lower half ot' the nut and throw it into engagementwith the thread on the screw Gr, and thus provide for the niceyadjustment of the jaws by means of the screw, and also prevent themoving of the jaw B,

except by turning the screw in the usual manner. A catch, m,.is providedon the jaw A for engagement with the lever IL, to hold it in place whenit is depressed to tighten the nut, as shown in Fig. 3. Instead of astraight sliding wedge, as shown, the tightening device may consist of acamor eccentric attached to or connected with the rock-shaft in anysnitvable manner, so as to produce a result similar

